Home / 5,185.16-7,778.40-1,899.80

Finding the Fourth Proportional to 5,185.16, 7,778.40 and 1,899.80

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Solution

The fourth proportional to 5,185.16, 7,778.40 and 1,899.80 is: 2,849.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,185.16 : 7,778.40 = 1,899.80 : x
  2. Step 2: Convert to fraction form
    5,185.16/7,778.40 = 1,899.80/x
  3. Step 3: Cross multiply
    5,185.16x = 7,778.40 × 1,899.80
  4. Step 4: Simplify right side
    5,185.16x = 14,777,404.32
  5. Step 5: Solve for x
    x = 14,777,404.32/5,185.16
  6. Step 6: Final answer
    x = 2,849.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.